Remove kernelUnitLength plumbing

Source/platform/graphics/filters/FEDiffuseLighting.h

Index: Source/platform/graphics/filters/FEDiffuseLighting.h
diff --git a/Source/platform/graphics/filters/FEDiffuseLighting.h b/Source/platform/graphics/filters/FEDiffuseLighting.h
index 0155b755d5bbd967f76938fcf2149ee3f70095b3..41100d918bd64ae4106e48bc62b6bb01ccff326d 100644
--- a/Source/platform/graphics/filters/FEDiffuseLighting.h
+++ b/Source/platform/graphics/filters/FEDiffuseLighting.h
@@ -32,7 +32,7 @@ class LightSource;
 class PLATFORM_EXPORT FEDiffuseLighting : public FELighting {
 public:
     static PassRefPtrWillBeRawPtr<FEDiffuseLighting> create(Filter*, const Color&, float, float,
-        float, float, PassRefPtr<LightSource>);
+        PassRefPtr<LightSource>);
     ~FEDiffuseLighting() override;
 
     Color lightingColor() const;
@@ -44,19 +44,13 @@ public:
     float diffuseConstant() const;
     bool setDiffuseConstant(float);
 
-    float kernelUnitLengthX() const;
-    bool setKernelUnitLengthX(float);
-
-    float kernelUnitLengthY() const;
-    bool setKernelUnitLengthY(float);
-
     const LightSource* lightSource() const;
     void setLightSource(PassRefPtr<LightSource>);
 
     TextStream& externalRepresentation(TextStream&, int indention) const override;
 
 private:
-    FEDiffuseLighting(Filter*, const Color&, float, float, float, float, PassRefPtr<LightSource>);
+    FEDiffuseLighting(Filter*, const Color&, float, float, PassRefPtr<LightSource>);
 };
 
 } // namespace blink